[Bug c++/90426] [P0732] Error constructing non-type template parameter from a prvalue

[mateusz.pusz at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90426

--- Comment #4 from Mateusz Pusz <mateusz.pusz at gmail dot com> ---
(In reply to Marek Polacek from comment #1)
> This compiles if I use {} instead of ():
> 
> struct gram : unit<ratio(std::milli{})> {};

I know that it compiles fine in the following cases:
struct gram : unit<ratio{std::milli{}}> {};
struct gram : unit<ratio(std::milli{})> {};  // not treated as a function type
struct gram : unit<ratio{std::milli()}> {};

So the only one lacking is:
struct gram : unit<ratio(std::milli())> {};